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metabolite

(Encyclopedia) metabolite, organic compound that is a starting material in, an intermediate in, or an end product of metabolism . Starting materials are substances, usually small and of simple structure...

metal

(Encyclopedia) metal, chemical element displaying certain properties by which it is normally distinguished from a nonmetal, notably its metallic luster, the capacity to lose electrons and form a positi...

metallic bond

(Encyclopedia) metallic bond: see chemical bond ; metal .

metallurgy

(Encyclopedia) metallurgy mĕt´əlûr˝jē [key], science and technology of metals and their alloys . Modern metallurgical research is concerned with the preparation of radioactive metals, with...

metalwork

(Encyclopedia) metalwork. Copper, gold, and silver were probably fashioned into ornaments and amulets as early as the Neolithic period. Goldwork and silverwork have since employed the talents of...

metamorphism

(Encyclopedia) metamorphism, in geology, process of change in the structure, texture, or composition of rocks caused by agents of heat, deforming pressure, shearing stress, hot, chemically active fluid...

metamorphosis

(Encyclopedia) metamorphosis mĕt˝əmôr´fəsĭs [key] [Gr.,=transformation], in zoology, term used to describe a form of development from egg to adult in which there is a series of distinct stages. Many ...

metaphor

(Encyclopedia) metaphor [Gr.,=transfer], in rhetoric, a figure of speech in which one class of things is referred to as if it belonged to another class. Whereas a simile states that A is like B, ...

metaphysical poets

(Encyclopedia) metaphysical poets, name given to a group of English lyric poets of the 17th cent. The term was first used by Samuel Johnson (1744). The hallmark of their poetry is the metaphysical conceit (a ...